The modifications set forth in the Rules define the role and functions of the Centre in administering arbitrations; for example, the fixing of arbitrator(s) fees is in accordance with the Centre’s schedule of fees which are based on the amount in dispute, rather than on a daily rated basis. This is to encourage the expeditious conduct of the arbitration and to give the parties an indication of costs at the outset. Other modifications include collection of deposits on account of fees and costs; ensuring compliance with the Rules and time limits; Dealing with appointments, challenges and replacement of arbitrators; provision of facilities and assistance.

Some of these functions are institutional in nature and do not form part of the UNCITRAL Rules, which possess no institutional features.